I personally was a long-time smoker before I went to vaping, but I know a few friends who were only ever social smokers (never bought their own packs) yet picked up vaping as an alternative to that "2-a-weekend" habit. In my opinion, if you're trading out any amount of smoking -- even if it's the potential 1 a week -- in exchange for vaping, you're making the right decision.
I remember when I was a kid, probably like 16 or so, lighting up a cigarette, taking a look at it in my hand and literally saying out loud, "You're going to kill me one day." I like to think I potentially negated that.